<template>
  <el-container>
    <el-header>
      <div>
        <img
          src="../assets/logo.png"
          class="logo"
          alt=""
        /><span>电商管理系统</span>
      </div>
      <el-button
        @click="logout"
        type="info"
      >退出</el-button>
    </el-header>
    <el-container>
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div
          class="toggle-button"
          @click="toggleCollapse"
        >|||</div>
        <!-- 菜单 -->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EEF"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu
            :index="item.id + ''"
            v-for="item in menuList"
            :key="item.id"
          >
            <!-- 内容模板 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconObj[item.id]"></i>
              <!-- 文字内容 -->
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item
              v-for="subItem in item.children"
              :key="subItem.id"
              :index="'/' + subItem.path"
              @click="saveNavState('/' + subItem.path)"
            ><template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>
<script>
export default {
  data() {
    return {
      menuList: [],
      iconObj: {
        '125': 'el-icon-user-solid',
        '103': 'el-icon-s-check',
        '101': 'el-icon-document-copy',
        '102': 'el-icon-shopping-cart-full',
        '145': 'el-icon-s-data'
      },
      isCollapse: false,
      activePath: ''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    //获取后台接口的菜单列表
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status != 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
    },
    //点击按钮实现菜单的折叠与展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>
<style lang="less" scoped>
.el-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0%;
  align-items: center;
  color: #ffffff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;

    span {
      margin-left: 15px;
    }
  }
  .logo {
    height: 60px;
    width: 60px;
  }
}
.el-aside {
  background-color: #333744;
  .toggle-button {
    background-color: #4a5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
  .el-menu {
    border-right: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
</style>
